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Current Electricity question

2024 · Q196
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Current Electricity question

2024 · Q196

NEETPhysicsCurrent ElectricityMCQ+4 / −1

The given circuit shows a uniform straight wire ABA BAB of 40 cm40 \mathrm{~cm}40 cm length fixed at both ends. In order to get zero reading in the galvanometer GGG, the free end of JJJ is to be placed from BBB at:

NEET 2024 (Re-Examination) Physics - Current Electricity Question 5 English

  1. A
    32 cm
  2. B
    8 cm
  3. C
    16 cm
  4. D
    24 cm
View written solutionFree

Correct answer: D

NEET 2024 (Re-Examination) Physics - Current Electricity Question 5 English Explanation

$$\begin{aligned} \& \frac{8}{x}=\frac{12}{40-x} \\ \& \frac{2}{x}=\frac{3}{40-x} \\ \& 80-2 x=3 x \\ \& 16=x \end{aligned}$$

from $B$

$$=40-16=24 \mathrm{~cm}$$

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